Hypodermic syringe



Modem W. W. HITOHOOOK.

HYPODERMIG SYRINGE.

No. 426,017. Patented Apr. 22, 1890.

7726 &

UNiTn e STATES PATENT @FFICE.

\VILLIAM \V. HITCHCOCK, OF LOS ANGELES, CALIFORNIA.

HYPODERMIC SYRINGE.

SPECIFICATION forming part of Letters Patent No. 426,017, dated April22, 1890. Application filed December 12I 1889. Serial No, 333,501.(Model) T0 aZZ whom it may concern:

Be it known that 1, WILLIAM W. HITCH- COCK, a citizen of the UnitedStates, residing at Los Angeles, in the county of Los Angeles and Stateof California, have invented a new and useful Improvement in HypodermicSyringes, of which the following is a specification.

The object of my invention is to produce a cheaper, more compact, andmore conveniently operated hypodermic syringe than has heretofore beenknown, securing, also, superior cleanliness and greater precision ofoperation. This I accomplish by means of the device described herein,and illustrated in the accompanying drawings, in which- Figure 1 is atop View of my improved syringe. Fig. 2 is a side view of the same. Fig.3 shows the several parts detached from each other. Fig. a is alongitudinal vertical midsection. Fig. 5 is a midsection showing theneedle incased within the neck and bulb for convenience in packing, thewhole being shown in a pocket-case.

It is common to operate ordinary syringes by means of india-rubberbulbs; but such bulbs have never-been applied to hypodermic syringes,for the reason that the bulb does not furnish sufficient purchase forthe proper manipulation of such syringe. My invention avoids thisdifficulty, and the convenient rubber bulb is thereby made applicable tothis class of syringes.

The perforated neck A, upon which the elastic rubber bulb B is bound bymeans of adjustable retaining-band O, is provided with handles D,extending along the outside of the bulb. These handles are preferablylaterally arranged and united at their rear ends to form a loop at therear of the bulb, as shown in the drawings, thus making a more completehandle. The neck A extends forward and backward from its junction withthe handles, and is laterally flattened and widened at its rear end toform a horizontally-wedgeshaped insertion E, projecting into the bulb,the outer edges of the wedge projecting beyond the body of the neck toform retaining-lugs a a, to hold the bulb on the neck A. The forwardextension of the neck A terminates in the nipple F, upon which thesocket of the de tachable needle G is fitted in the ordinary manner.

The neck of the rubber bulb B is provided at its end with two notches ce, to fit upon the handles D, so as to give more lap between the band Cand the end of such neck when the band is in place, thereby (and withoutmaking the neck A too long) avoiding the possi bility of leakage.

The syringe is provided with a projecting lug arranged on the upperouter side of the syringe. This lug may be formed, as shown in thedrawings, of the perforated lugs Z) I), attached to and projectingupward from the outside of the retaining-band. Tension-screw 0 passesthrough a plain perforation in one of the lugs, and screws into ascrew-threaded perforation in the other lug, thus drawing the lugstogether to decrease the size of the band, thus clamping the neck of thebulb firmly upon the perforated neck A.

The purpose of this projection is to give purchase for the thumb of theoperator.

The operation is as follows: The bulb is compressed between the thumband finger to expel the air, and is then filled with the liquid to beinjected. The needle being properly adj nsted, the syringe is held withthe needle pointing upward, while the operator compresses the bulb untilthe needle is filled to the point, thus expelling all the air. Theoperator holds the syringe with the forefinger beneath the bulb and incontact with one of the handles D, the ball of the thumb presses the topof the bulb, and the end of the thumb rests against the rear of theprojection formed by the lugs b I), and the second finger is in contactwith the other handle. The position of the fingers may be altered; butit will be found that the side handles D D and the top projection b I?give the operator perfect control of the syringe. The horizontalwedgeshaped joint of the insertion end of the neck enables the operatorto compress the bulb until all the fluid is expelled. The several partsare easily taken apart and cleaned. The syringe can ordinarily be easilycleaned by washing, as is common with bulb syringes, some antisepticsolution being used, if desired. The perfect freedom from valves rendersthis syringe perfectly antiseptic with 01'- dinary care. Thelongitudinal perforation or duct d through the neck A is of sufficientdiameter to receive the needle, so that when the instrument is not inuse the detachable needle G may be reversed and incased within the neckand bulb, thus securing superior compactness and preserving the needlefrom injury. The syringe when thus put together may be placed in thecase H and conveniently carried in the vest-pocket. The looped handleshown prevents accidental longitudinal compression of the bulb, whichotherwise might occur when the parts of the syringe are adjusted asshown in Fig. 5, and which compression might cause the needle to punc-'ture the bulb;

It is obvious various means may be employed to secure the bulb to theneck-for example, a wire might be bent around the neck of the bulb andthe ends twisted together to form a projection equivalent to theprojection formed by lugs b b. I do not wish to limit my claim to theband shown.

Now, havingdescribed my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a hypodermic syringe, the combination of an elastic bulb, aperforated neck provided with a handle extending along the outside ofthe bulb, and means for securing the bulb to the neck.

2. In a hypodermic syringe, the combination of an elastic bulb,aperforated neck provided with laterally-arranged handles ext-endingalong the outside of the bulb and united at the rear thereof, and meansfor securing the bulb to the neck.

3. A hypodermic syringe comprising the combination of an elastic bulb, aperforated neck provided with laterally-arranged handles extending alongthe outside of the bulb, means for securing the bulb to the neck, and aprojecting lug arranged on the upperouter side of the syringe.

4. In a hypodermic syringe, the combination of an elastic bulb,aperforated neck provided with the laterally widened wedgeshapedinsertion and with a handle extending along the outside of the bulb, theretainingband provided with the perforated lugs, and the tension-screw.

. WILLIAM W. HIlOI-ICOCK, WVitnesses:

JAMES R. TOWNSEND,

M. O. GALER.

